单选题 The murderer was brought in, with his hands ______ behind his back.
  • A. be tied
  • B. tied
  • C. to tie
  • D. tying
【正确答案】 B
【答案解析】[解析] 本题的考点是独立主格结构。tie和his hand构成被动关系，用过去分词，表示被动。